Improved flour-sifter



Nrrnn STATES LarnNr rrreE.

IMPROVED FLOUR-SIFTER.

Specification forming part of Leiters Patent N0. 7,056. dated March 28,1365.

o all whom, it may concern.-

Be it known that I, HOWARD TILDEN, of the city and county ofPhiladelphia, in the State of Pennsylvania, have invented certain newand useful Improvements in Flour Sifters for Family Use; and I do herebydeclare that the following is a full and exact description of the same,reference being had to, the drawings that accompany and form a part ofthis specification, in which- Figure l is a perspective view of thearticle as it stands entire; Fig. 2, an end view of the interior parts,showing their arrangement; Fig. 3, a view of the shaft with itsimmediate attachments; Fig. 4, a view of the sieve.

The same letters represent corresponding parts in the different figures.

Letter A represents the box which contains the sieve, the tlour, and theshaft and rubbers.

Letter B represents the sieve of wire-cloth, or its equivalent.

Letter C represents an equi-quadrilateral shaft, the corners of whichhave strips of rubb r on them, as seen in Figs. 2 and 3 of the drawings,to produce the friction on the inner surface of the sieve B.

Letters D D represent boards for the purpose of conducting the flour tothe top of the shaft C, and are arranged as seen in Fig. 2.

Letter E represents a crank to turn the shaft by when the machine isworked.

Letter F represents an opening in 011e side ofthe box, where the flouris taken out after being sifted.

Letter G represents a slide to close the opening F, and, being suppliedwith the handle h, answers the purpose of a shovel to take out theflour.

Letters i i t' i represent strips of rubber on the angles of the shaft(l, as may be seen in Fig. 3.

'Io enable others skilled in the art to make and use my invention, Iwill describe its con struction and mode of operation.

The body of the box I make of wood not more than three-eighths of aninch in thickness, that it may be light. The shaft I make of wood fromtwo to two and one-half inches in diameter, and may be quadrilateral orof any number of plain surfaces and angles, and on more or less of thesecorners or angles I fasten strips of rubber t' t i i, and so arranged,with reference to their approach to the sieve when in rotation, that theedge fastened to the shaft may approach the sieve rst, leaving the edgethat extendsv beyond the corner of the shaft to follow after and bedrawn over the interior side or surface of the sieve B, and thusproducing a rubbing and sweeping of the iiour through the interstices ofthe said sieve. The two upper edges of the sieve B are securely fastenedto the lower edges of the boards D l). This sieve should in its lengthbe such as to just till the space between the endsofthe box. All else ofthe structure of my sifter will be readily understood by observing thedrawings..

In the use of my machine one has only to putin the fiour at the top, andrevolve the shaft,and the work is performed well and with greatexpedition.

I preserve the continuity of the sides of the box quite to the bottom,so as to avoid the flying about of the tine flour-dust.

'The Hour after being sifted is readily taken out at the opening F, and,if any remains not needed at the time, it is kept all clean and nice inthe box until wanted.

Now, I do not claim, broadly, any particular form ofthe sieve, nor theprinciple, broadly, of sifting tiour or meal by passing rubbers orScrapers over the interior surface of a sieve, but

What I do claim, and desire to secure by Letters Patent, is-

The combination of the equi-quadrilateral shaft G, or its equivalent,having on two or more of its corners the rubber strips 'i t', or theirequivalent, with the sieve B and the box A, substantially as described,and for thepurposes set forth.

IIOWA HD TILDEN.

fitnesses J. H. LITTLEFIELD, F. T. GUsrrrNG.

